Oil inclosed rotary



NOV. 5, D Ml SMlTH OIL INCLOSED ROTARY Filed June 3, 1931 4 Sheets-Sheet 1 Nov. 5,

1935.. D. M. SMITH OIL INGLOSED ROTARY lFiled June I5, 1931 4 sheets-sheet 2 Nov. 5, 1935. D. M. SMITH 2,020,004

OILi INCLOSED ROTARY Filedl June 3, 1951 4 Sheets-Sheet 3 A 7 TURA/5% OIL INCLOSED ROTARY Filed June 3, 1951 4 Sheets-Sheet 4 [/v VUV TOR: Da l//Q M 5mi/V1,

Patented Nov. 5, 1935V UNITED STATES PATENT OFFICE OIL INCLOSED ROTARY Application June 3, 1931, Serial No. 541,771

9 Claims.

My invention relates to rotary machines of the character employed in drilling oil wells by the socalled rotary system.

In the oil well drilling industry a rotary machine is placed on the, derrick floor of a well. A

drill pipe extends through a rotary table of the rotary machine and carries a bit at its lower end. In the present common form of rotary machine the rotary table has a bevel or ring gear which is driven by a pinion mounted on a pinion shaft journalled in bearings of the rotary machine. A sprocket is secured to the outer end of the pinion shaft, which sprocket is driven from a draw-Works of the derrick by a chain and sprocket arrangement. The rotary table rotates the drill pipe and the bit, the bit sinking the Well.

Oil wells today are being drilled to exceedingly great depths, necessitating larger and heavier drilling apparatus, which consequently materially increases the already tremendous strains to which rotary machines are subjected during operation. As a result the working parts of rotary machines have been made more and more rugged and massive to endure these strains and a consequent necessity has arisen for suitable lubrication of these working parts to minimize friction and to reduce Wear.

It is an object of my invention to provide a rotary machine in which all of the Working parts are completely inclosed and constantly lubricated.

It is another object of the invention to provide an oil inclosed rotary machine in which the bevel ring gear of the rotary table, the pinion, and a main table thrust bearing included in the machine are all operable in a common bath of oil.

Another valuable feature of the invention lies in the fact that the pinion shaft bearings of the machine are of unitary type so that the entire pinion shaft assembly can be assembled before being inserted into a pinion shaft housing ineluded in the base of the machine.

Another feature of the invention resides in the provision of a floating bearing which supports the pinion shaft at the inner end thereof adjacent the pinion, and an outer thrust bearing supporting the outer end of the pinion shaft, which is secured to the base of the machine after the pinion shaft assembly is positioned in its housing.

'It is another object of my invention to provide the inner oating bearing, supporting the pinion shaft as described in the above paragraph, with a bearing carrier which includes means for preventing' the rotation thereof but allows this bearing carrier to move longitudinallyrelative to the pinion shaft and the housing to allow for expansion. l

Still another important feature of my invention lies in the fact that the rotary table top is anged to overhang the ring gear and cooperates with the base of the machine to 'completely inclose the ring gear.

Another unique feature of my invention is that the tapered roller bearing which journals the rotary table on the base of the machine is designed so that the axes of the rollers included in the bearing are disposed at an angle to the horizontal so that the faces of the rollers lie in a plane at a steep angle from the horizontal to facilitate the centering of the table on the base.

' Another important feature of the invention is that the pinion shaft lock and lock pawls of the machine are entirely inclosed within the pinion shaft housing, the pawls being operated by lever means from the exterior of the housing.

It is another object of my invention to provide in a rotary machine of the type described an oil reservoir in which a body of lubricant is maintained, in which the pinion of the machine ls rotatable, the pinion being operable to carry or splash the lubricant to the rotary table ring gear meshing therewith.

All of the above noted. objects and features of the invention will be made evident and other features and advantages will be brought out in the following specification, describing the invention in detail in connection with the accompanying drawings, and the appended claims.

Referring to the drawings:

Fig. l is a perspective View of a rotary machine embodying the features of my invention.

Fig. 2 is a top plan View of the rotary machine shown in Fig. l, this view having parts broken away to 4show certain details of construction.

Fig. 3 is a longitudinal sectional view of the rotary machine taken as indicated by the line 3 3 of Fig. 2.

Fig. 4 is a vertical section taken as indicated by the line 4-4 of Fig. 2, this view showing the rotary table locking arrangement of the invention.

Fig. 5 is a fragmentary section taken as indicated by the line 5-5 of Fig. 2 and showing the manner in whicha lower rotary thrust bearing of the invention is lubricated.

Fig. 6 is a horizontal section taken as indicated by'the line 6--5 of Fig. 5.

Fig. 7 is an enlarged fragmentary section taken on a plane indicated by the line 'l-l of Fig. 4,

I4 and A'nsl this view showing the manner in which the pinion shaft bearings of the invention are lubricated.

Fig. 8 is an enlarged fragmentary sectional view comparable to that portion of Fig. 3 within the dotted line circle 8.

Fig. 9 is an enlarged fragmentary sectional view comparable to that portion of Fig. 3 within the dotted line circle 9.

Referring rst to Figs. 1 to 4 inclusive, I show a rotary machine generally designated by the numeral I which includes a base casting I2 providing a horizontal wall I3 having depending sides of double walled construction forming skids I5. Formed integrally with the horizontal wall I3 adjacent one end thereof is a vertically extending annular wall I6, this wall being of a diameter equal to the width of the horizontal wall I3 as defined by the skids I4 and I5. Adjacent to its upper edge the annular wall I6 is increased in thickness and is cored to form an annular rim I1 having series of vertical passages I8 extending from the upper edge I9 of the wall "I6 to the lower edge 20 of the rim |1. Formed also integrally with the wall |3 is a vertically extending annular wall 22 which is of somewhat smaller diameter than the vertical wall I6 and cooperates with this wall 6 and the horizontal wall I3 to form an oil reservoir 23. The wall 22 extends upwardly from the wall I3 a com- -paratively short distance relative to the wail I6 and is of considerably lgreater thickness than this wall for the purpose of providing an upper horizontal surface 25 for the support of a rotary table bearing generally designated by the numeral 26 in Figs. 2 and 3. The inner annular surface 21 of the wall 22 defines an opening which extends through the horizontal wall I3, this openlng being concentric with the vertically extending annular wall I6.

The bearing 26 is preferably of the tapered roller type and comprises alower stationary race 30, tapered rollers 3| spaced -by a roller retainer 32, and an upper rotatable race 33. The 'lower race 30 is prevented from rotation relative to the base I2 by a series of dowel pins 34 which project upwafrdly from the surface l25 of the wall 22 and extend into depressions 35 formed in the lower face of the race 30. The bearing 26 is preferably designed so' that the axes of rotation of the tapered rollers 3| are positioned at approximately 45 from the vertical so that the upper faces .of these rollers` lie in a plane at a relatively steep angle from the horizontal to facilitate the centering of a rotary table 46 which is journalled by the bearing 26. The rotary table 40 includes a vertically extending cylindrical wall 4| of such an external diameter as to engage the inner surface 21 of the wall 22 in a running fit, this wall 4| terminating upwardly in an annular shoulder 42, providing a downwardly facing horizontal surface 43 against which the race 33 abuts and to which this raceis secured by any suitable means.

Formed integrally with'the wall 4| of the table 4I! is a horizontally extending ange forming the' the table top 44 is a mud fluid seal generally designated by the numeral 50 in Figs. 3 and 8, the details of this seal being best shown in Fig. 8. Referring to these two figures, I show the seal 50 as including an annular groove 5| formed in the upper edge I9 of the wall I6, this groove providing an inner upwardly extending lip 52 and an outer upwardly extending lip 53. The groove 5| extends through and communicates with the vertical passages I8. Formed on the under surface of the table top 44 is a depending annular ridge 54 which extends downwardly into the groove 5|. The inner vertical annular surface 55 of the ridge 54, the horizontal under surface of the table top 44, and the outer vertical annular surface of the ring gear 46 cooperate with the inner lip 52 to form an annular passage 56 between the bottom of the groove 5| and the interior of the base casting I2, this passage V56 in cross-section having the form of an inverted U. Formed on the periphery of the table top 44 is l"a depending annular flange 51 providing an inner vertically extending annular surface 68 which cooperates with the under surface of the table top, the outer vertical annular surface 69 of the ridge 54, and the upwardly extending outer lip 53, to form a narrow annular passage 10 communicatf ing between the bottom of the groove 5I and the exterior of the rotary machinell, this passage 10 in cross-section also having the form of an inverted U as shown. r

Provided adjacent the mud fluid seal 50 is an oil saving means generally designated by the numeral 13 in Figs. 3 and 8. Provided on the periphery of the ring gear 46 is an outwardly.

extending flange 15, the under surface of which is formed to provide a depending annular bead 16. Formed on the inner surface of the wall I6 directly below the bead 16 is an annular shoulder 11 in the upper edge of which is formed an annular trough 18. The bead 16 overhangs the trough 18 in the manner shown. Provided in the shoulder 11 are a series of4 vertical drain openings 18 extending from the trough 18 to the lower surface of the shoulder 11.

Secured to the inner surface of the wall I6, as by screws or other means, are a number of downwardly sloping drip pans 80. These drip pans 86 A are positioned directly below and adjacent' the Referring to Figs. 3, 5, and 9, the numeral 8| designates an oil throw-off means which is adapted to return lubricatingA uid from the bearing 26 to the oil reservoir 23. This throwloff means 8| includes a narrow vertically extending annular flange 82 formed on the inner periphery of the bearing supportingsurface 25 of the wall 22. Formed on the outer surface of the cylindrical wall 4| of the rotary table 46 at a point directly above the ange 82 and directly below the bearing retainer 32, are a plurality of annular grooves 83. The grooves 83' are adapted to prevent lubricating uid from finding its way downwardly between the wall 4I and the ange 82 of the wall 22 by reason of the fact that these grooves collect any fluid which might be flowing downwardly on the surface of the wall 22, this fluid being thrown outwardly over the flange 82 by centrifugal force as the rotary table revolves. Provided in spaced relationship in the upper surface 25 of the wall 22 are a plu- .rality of downwardly and outwardly sloping thus maintain a proper relationship between the table U and the bearing 26. In Figs. 3 and 5, I show the inner annular surface 27 of the wall 22 formed to provide a recess including a downwardly facing ledge 9| and a vertically extending annular wall 92. Suitably secured to the ledge 9| is a stationary race 93 of a bearing 94. The bearing 94 also includes a rotatable race 95, balls 96, and a ball retaining member 91, the race 95 being secured to and supported by a bearing carrier designated by the numeral 90.

The bearing carrier 98 is secured to the lower end of the cylindrical wall 0| by a threaded connection and is keyed thereto in the manner indicated in the drawings for the purpose of preventing relative rotation between the carrier 90 and the wall 0| of the rotary table. A lock plate 99 contacting the lower faces of the wall' 4| and the carrier 90 is secured by cap screws |00. The bearing carrier 93 is preferably provided with a vertically 4extending annular flange |0| which is of suchfa diameter as to provide a very slight clearance between. this flange and the annular wall *92, said carrier and flange structure comprising a closure member for the purpose of excluding mud fluid, water, `or other foreign substance from. the bearing 90. The

vbearing 94 is lubricated by lubricating means generally designated by the numeral |02 of Figs. and 6. Formed in the wall 22 in a plane between the bearing 20 and the bearing '90 is a lubricant chamber |03.

For the purpose of conveniently forming this chamber |03 and to lighten the construction of the base casting 2, I provide in the surface 2l of the wall 22 acored annular recess I0@ which is webbed at suitable intervals. Positioned between the inner ends of two of these webs |05 indicated in Fig. 6 at a suitable point on the machine, indicated by the line 5 5 of Fig. 2, is a closure plate |06 which is secured to the webs |05 as by welding to form the completely inclosed chamber |03.

Connecting the wall 22 with the wall I6 is a web |01 through which is formed a cored'passage |00 which communicates between the chamber |03 and the exterior` of the wall I6. Threadedly closing the outer end of the passage |00 is a lubricating plug |09, such as an Alemite fitting, through which a lubricating iiuid or grease may be delivered to the chamber |03. Communicating between the chamber |03 and the bearing recess formed by the wallsv 9| and 92 is a port ||0 adapted to deliver lubricant from the chamber |03 to the bearing 90.

Figs. 5 and 6, at a point inside the inner periphery of the bearing 90 so that the lubricant will be caused to flow outwardly through the The port '5 ||0 is preferably positioned, as is indicated in bearing by centrifugal force as the rotary table 40 is rotated. f

Formed integrally with the base casting |2 is a cylindrical pinion shaft housing H5, the axis thereof being perpendicular to the axis of the rotary table and parallel with the longitudinal axis of the base |2. Journalled in the housing I5 byv inner and outer bearings, generally designated by the numerals ||6 and respectively, is a pinion shaft IIB. The pinion shaft ||0 carries at its inner end a bevel pinion 9 which meshes with and serves to rotate the bevel ring gear 06. Keyedl to the extreme outer end of the pinion shaft 8 is a sprocket |20 adapted for a chain engagementwith a source of power not shown.

Referring to Figs. 3 and 7, the inner bearing ||6 includes a bearing carrier |2| which is slidable longitudinally within the cylindrical housing H5 and in which is formed an axial annular recess providing a cylindrical wall |22 and a vertical wall |23. The wall |23 is provided with an axial opening |20 through which the pinion shaft extends, and suitable packing is provided therein as indicated at |25 in Figs. 3 and '7. Positioned in the recess of the bearing carrier |2| is a bearing |26, preferably of the double roller type, which includes an outer stationary race |28 contacting the cylindrical wall |22 and an inner race |21 secured to the pinion shaft H8. Between these races is confined a roller retainer |29 carrying a plurality of rollers |30. Closing ythe bearing recess of the bearing carrier |2| is a cover plate |3| which is secured to the carrier |2| by screw means |32. The plate |3| is adapted to be pressed against the outer race |28 and prevents the rotation thereof relative tothe bearing carrier |2|. Theplate |3| is provided with an axial opening |33 through which the pinion shaft extends and suitable packing is provided therein, as indicated at |30 in the drawings. Formed in theouter periphery, of the bearing carrier |2| is a longitudinal slot |35. Adjacent the slot is an inspection opening formed in the housing H5, which opening is covered by a lock plate |36 having a depending key |32 adapted for slidable reception into the slot |35. It will be seen that th'e key |3'|' prevents rotation of the bearing carrier relative to the housing ||5 but allows the carrier |2| to move longitudinally therein to accommodate expan- SlVe fOICeS.

The outer bearing carrier and its included roller bearing is identical with the arrangement of the bearing carrier ||6 and its included bearing, just described, with the exception that a cover platel |30, comparable to the cover plate |3l, is rigidly secured to the housing H5 by screw means as shown at |39 in Fig. 3. Each of the bearing carriers H6 and ||`l is'provided with individual lubricating means and as the arrangement is identical in each of these bearings, I will describe only the lubricating means |40 in connection with the carrier H0.

The lubricating means |00 includes a cored passage l0! which communicates with both sides of the bearing |26 through the walls of the carrier |2|, as defined by the exterior thereof, and the recess formed by the cylindrical wall |22 and the vertical wall |23. Communicating with the cored passage ||i| is a passage |32 .extending outwardly to the outer periphery of the carrier |2|. Formed in the housing ||5 at a point adjacent the passage |02 is a port |03 ywhich is lthreadedly closed by a lubrication plug |00 through which oil or grease may be introduced. It will be seen that lubricant thus introduced will travel through the port |43 and the passages |42 and I4| to completely iill the space surrounding the bearing |26, this space being defined by the cylindrical wall |22, the vertical wall |23, andf the cover plate I3I.

As best shown in Fig. 4, the pinion shaft II8 is provided with a lock means, generally designated by the numeral |50, which includes a cylindrical sleeve I5I keyed to the shaft II8 intermediate the bearing carriers II6 ,and II1, this sleeve I5I being provided with a plurality of radial teeth or projections |52. The housing II5 is laterally extended to provide an inclosed casing |53 for the reception of a pair of lock pawls |54. One of the pawls |54 is pivotally mounted on a shaft |55 on each side of the sleeve I 5|, these shafts |55 being journalled inthe walls of the casing |53, as best shown in Fig. 2. Secured to each of the shafts |55 on the exterior of the casing |53 is a weighted lever |56. The relation between the lock pawls |54 and the levers |56 is such that when thel levers |56 are in a raised position and resting against the housing II5, as indicated at A in Figs. 2 and 4, the lock pawls are in engagement with certain of the projections |52 of the sleeve |5I, at which time the pinion shaft I|8 and consequentlyl the rotary table 40 are locked against rotation. Likewise, when the levers |56y are in a lowered position and resting on the horizontal top wall I3, as indicated at B in Figs. 2 and 4, the lock pawls are in a disengaged position and the pinion shaft II8 and the rotary table 40 are free to rotate.

For the purpose of preventing mud uid from being thrown outwardly from the rotary table over the derrick floor by centrifugal force, and as a means of guarding workmen from possible injury, I provide a ring guard |60 adapted to cover the outer portions of the rotary table, as shown best in Figs. 2, 3, and 8. The ring guard |60 comprises a flanged ring providing a vertically ex' tending annular wall I6I surrounding the periphery of the rotary table top 44, and a horizontally extending plate |62, formed integrally with the wall I6I.

Provided in suitably spaced relationship on the exterior ofthe wall I6 are a plurality of' outwardly extending lugs |63 upon which the bottom edge of the wall I6I rests, the ring guard being held rigid relative to the base casting I2 by cap screws |64 extending through the horivzontal plate |62 and threadedly engaging these lugs. The ring gear is supported in such a manner as to provide a slight clearance, as indicated at |65, between the table top 44 and the under face of the plate I 62. Acentral opening A|66 is provided in the plate |62, this opening being of suflicient diameter to allow the drill pipe and other equipment to project upwardly therethrough during the course of drilling a well. Projecting inwardly from the vertical wall I6I of the ring guard are a plurality of radially spaced fins |61 which are preferably of vertical extension. These fins |61 are formed integrally with the wall I6I and extend inwardly to a point just short of the periphery of the rotary table top 44, for a purpose to be described later.

The operation of the lubrication arrangement for the pinion I I9, the ring gear 46, and the roller bearing 26, is as follows:

As the rotary table 40 is rotated by thedrawworks of a derrick .through the sprocket |20, the pinion shaft I I8, the pinion I|9 and the ring gear 46, the pinion II9, being partly submerged in the body of lubricating fluid contained in the reservoir 23, picks up a quantity ofv uid and carries it into contact with the teeth 41 of the ring gear 46. A portion of the oil adhering to 5 the teeth 41 of the ring gear is thrown outwardly by centrifugal force against the inner surface of the wall I6 and is collected by the drip pans and flows down these pans to be delivered directly to the annular bearing 26, as indicated 10 by the arrows C of Figs. 8 and 9. Any of the fluid adhering to the teeth 41 of the ring gear which might be caused by centrifugal force to travel outwardly along these teeth and tend to flow upward through the passage 56, as indicated 15 by the arrows D of Fig. 8, is caught by the depending bead 16 and caused to collect in the trough 18, from which it is drained through the openings 19 and delivered onto the pans 80.

'Ihe lubricating uid delivered to the roller 20 bearing 26 by the drip pans 80 eventually finds its way to thel lower portion of the bearing and from there flows downwardly and outwardly through Athe drain channels and into the reservoir 23, as indicated by the arrows E of Fig. 9. 25 A portion of the oil from the bearing 26 will tend to adhere to the cylindrical wall 4I and will Vflow. downwardly over the surface thereof until reaching thethrow-oif grooves 83, which grooves collect the y.fluid and throw it outwardly, 30 by centrifugal force, over the ange 82 and into the drain channels, as indicated by the arrows F of Fig. 9.

It will be seen that the oil saving means 13 described above and the oil throw-off means 8| 35 just described effectively prevent any of the circulating lubricating iiuid which constantly flows over the pinion I I9, the ring gear 46, yand the roller bearing 26, from escaping from the interior of the rotary machine.

The operation of the guard ring |60 to prevent mud uid f rom being thrown outwardly over the derrick floor, and the operation of the mud fluid seal 50, is as follows:-

Referring in particular to Figs. 2 and 8, and 45 assuming that the rotary table is rotating in a clockwise direction, as indicated by the arrow G of Fig. 2, it will be'understood that any mud fluid that has been allowed to collect on the top of the rotary table will be thrown out- 50 wardly with great force in paths substantially tangential to the periphery of the rotary table, as indicated by the arrows H of Figs. 2 and 8.

It is quite usual during the course of drilling a well for the rotary table to be driven at speeds 55 ranging from to 140 revolutions per minute and I have found by experiment that the force at which mud and water are thrown outward from the table is so great that the mud iiuid after it has been thrown against the guard tends 60 to follow a downwardly spiralling path over the interior surface of the guard. The fins |61 provided on the interior surface of my ring guard |60 serve to effectively prevent this spiralled flow of the mud iiuid and to break up the force of 65 the ow so that the mud uid has no tendency to reaching the bottom of the groove 5I, flow downwardly through the vertical passages I8 provided in the rim I1. It will be seen that none of the mud fluid or water can penetrate to the interior of the machine to adulterate the lubricating fluid contained in the oil reservoir 23. 'I'his is a particularly valuable feature' inasmuch as it is the usual practice while Washing down to direct a high pressure water stream against the rotary machine and upon the derrick door. During this .washing down operation the water can penetrate only as far as the bottom of the groove 5l and will then be drained therefrom by the passages I8.

Although I have herein shown and described only one complete embodiment of my invention, which fully discloses the above named objects and features thereof, it is apparent that my invention should not be limited to the details of -construction shown and described. I am aware of various features of the invention which might be changed and numerous embodiments thereof which might be devised, all of which come within the scope of the invention as defined by the following claims.

I claim as my invention:

1. In a rotary machine of the type used in drilling oil wells, the combination of a base; a rotary table rotatably supported' on said base; a pinion shaft; means whereby said pinion shaft rotates' said rotary table; a cylindrical housing supported by said base; a bearing for rotatably supporting said pinion shaft; and a bearing retainer supported inside said cylindrical housing, said bearing retainer inclosing said bearing, said bearing retainer providing a lubricant chamber for said bearing, and said bearing retainer comprising two parts adapted to be secured together around said bearing after said bearing has been secured on said pinion shaft.

2. In a rotary machine of the type used in drilling oil wells, the combination of: a base; a rotary table rotatably supported on said base; a pinion shaft; means whereby said pinion shaft rotates said rotary table; a cylindrical housing supported by said base; a bearing for rotatably supporting said pinion shaft; and a bearing retainer supported inside said cylindrical housing, said bearing retainer inclosing said bearing, said bearing retainer providing a lubricant chamber for said bearing, and said bearing retainer comprising two parts adapted to be secured together around said bearing after said bearing has been secured on said pinion shaft, said parts providing a cylindrical wall adapted to support said bearing, and two side walls extending inwardly to said pinion shaft on opposite sides of said bearing and spaced therefrom so that said lubricant chamber is formed on opposite sides of said bearing.

3. In a rotary machine of the character employed in drilling oil wells, the combination of: a base having a central opening, and a recess formed around the lower end of said central opening; a rotary table rotatably supported on said base, and ,having an extension projecting through said central opening; a hold-down bearing-in said recess engaging said base; a closure member threadedly secured to said extension for completely closing the lower end of said recess and for supporting said hold-down bearing; and

member to close the joint between said cylindrical wall and said closure member.

5. In a rotary machine, the combination of a base, a rotary table rotatably supported on the base, a' gear onsaid table, means including a 15 vertically extending annular wall on the base cooperating with the table to form an inclosure around the table, an opening in said wall, said base being integrally formed with an outwardly extending pinion shaft supporting portion, a part 20 of said extension merging into the annular wall of the base around said opening, a pinion insertable through the opening in said wall to mesh with said gear, a shaft to drive said pinion, spaced bearing retainers removably mounted and cir- 25 cmferentially confined within the pinion shaft supporting portion of the base, Abearing means .mounted within the retainers to rotatably support the shaft, closure anges carried by said retainers to confine the bearing means longi- 30 tudinally of the shaft, and means cooperating with the base to prevent the rotation of said retainers.

6. In a rotary machine, the combination of a base, a rotary table rotatably supported on the 35 base, a gear on said table, means including a vertically extending annularwa1l on the base cooperating with the table to form an inclosure around the table, an opening in said wall, said base being integrally formed with an outwardly 40 extending pinion shaft supporting portion, a part of said extension merging into the annular wall of the base around said opening, a pinion insertable through the opening in said wall to mesh with said gear, a shaft to drive said pinion, spaced 45 bearing retainers removably mounted and circumferentially conned within the pinion shaft supporting portion of the base, bearing means mounted within the retainers to rotatably support the shaft, closure flanges carried by said 50 retainers to confine the bearing means longitudinally'of the shaft, means cooperating with the base to prevent the rotation of said retainers; and lock means for the pinion shaft positioned between said retainers.

7. In a rotary machine, the combination of a base, a rotary table rotatably supported on the base,.a gear on 'said table, means including a vertically extending annular wall on the base cooperating with the table to form an inclosure 60 around the table, an opening in said wall, said base being integrally formed with an outwardly extending pinion shaft supporting portion, a part of said extension merging into the annular wall of the base around said opening, a pinion insert- 65 able through the opening in said Wall to mesh with said gear, a shaft to drive said pinion, a drive element mounted on said shaft, bearing retainer means removably mounted and circumferentially confined Within the pinion shaft supporting portion of the base, bearing means mounted within the retainer. means to rotatably support the. shaft, a bearing closure flange surrounding the shaft and carried by the retainer means and positioned between one end thereof and the pinion, a bearing closure ange surrounding the shaft and carried by the retainer means and positioned between one end thereof and the drive element, and means cooperating with the base to prevent the rotation of said retainer means.

8. In a rotary machine of the type used in drilling oil wells, the combination of: a base; a rotary table rotatably supported on said base; a pinion shaft; means whereby said pinion shaft rotates said rotary table; a cylindrical housing supported by said base; a bearing means including inner and outer races and bearing elements therebetween for rotatably supporting said pinion shaft; and a. bearing retainer supported inside said cylindrical housing, said bearing retainer having inwardly extending walls for inclosing said bearing means, and said bearing retainer providing a lubricant chamber for said bearing.

9. In a rotary machine of the type used in 4drilling oil wells, the combination of a base; a

rotary table rotatably supported on said base; a pinion shaft; means whereby said pinion shaft rotates said rotary table; a cylindrical housing supported by said base; a bearing means including inner and outer races and bearing elements therebetween for rotatably supporting said pinion shaft; and bearing retainer means adapted to be assembled around said bearing means after said bearing means has been placed on said pinion shaft said assembly being insertable as a whole into saidcylindrical housing and said bearing retainer means supporting said bearing means in said housing. r

- DAVID M. SMITH.

DISCLAIMER Calif. OIL ENcLesED ROTARY.

' Patent dated November 5, 1935. Dis

the assignee, Emsco Dew-ick c@ Equipment Company.

Hereby enters this disclaimer t0 claims 1, 2, and 8 in said Letters Patent.'

{Ocz'al Gazette November 30, 1.937.]

-Damld IVI. Smith, Hermosa Beach clnimer fledNovember 8, 1937, by 

